Move remaining effects to the effects subdir

1 files changed, 343 insertions, 0 deletions

diff --git a/Alc/effects/modulator.c b/Alc/effects/modulator.c
new file mode 100644
index 00000000..ec99bd53
--- /dev/null
+++ b/Alc/effects/modulator.c
@@ -0,0 +1,343 @@
+/**
+ * OpenAL cross platform audio library
+ * Copyright (C) 2009 by Chris Robinson.
+ * This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, write to the
+ *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ *  Boston, MA  02111-1307, USA.
+ * Or go to http://www.gnu.org/copyleft/lgpl.html
+ */
+
+#include "config.h"
+
+#include <math.h>
+#include <stdlib.h>
+
+#include "alMain.h"
+#include "alFilter.h"
+#include "alAuxEffectSlot.h"
+#include "alError.h"
+#include "alu.h"
+
+
+typedef struct ALmodulatorStateFactory {
+    DERIVE_FROM_TYPE(ALeffectStateFactory);
+} ALmodulatorStateFactory;
+
+static ALmodulatorStateFactory ModulatorFactory;
+
+
+typedef struct ALmodulatorState {
+    DERIVE_FROM_TYPE(ALeffectState);
+
+    enum {
+        SINUSOID,
+        SAWTOOTH,
+        SQUARE
+    } Waveform;
+
+    ALuint index;
+    ALuint step;
+
+    ALfloat Gain[MaxChannels];
+
+    FILTER iirFilter;
+} ALmodulatorState;
+
+#define WAVEFORM_FRACBITS  24
+#define WAVEFORM_FRACONE   (1<<WAVEFORM_FRACBITS)
+#define WAVEFORM_FRACMASK  (WAVEFORM_FRACONE-1)
+
+static __inline ALfloat Sin(ALuint index)
+{
+    return sinf(index * (F_PI*2.0f / WAVEFORM_FRACONE) - F_PI)*0.5f + 0.5f;
+}
+
+static __inline ALfloat Saw(ALuint index)
+{
+    return (ALfloat)index / WAVEFORM_FRACONE;
+}
+
+static __inline ALfloat Square(ALuint index)
+{
+    return (ALfloat)((index >> (WAVEFORM_FRACBITS - 1)) & 1);
+}
+
+
+static __inline ALfloat hpFilter1P(FILTER *iir, ALfloat input)
+{
+    ALfloat *history = iir->history;
+    ALfloat a = iir->coeff;
+    ALfloat output = input;
+
+    output = output + (history[0]-output)*a;
+    history[0] = output;
+
+    return input - output;
+}
+
+
+#define DECL_TEMPLATE(func)                                                   \
+static void Process##func(ALmodulatorState *state, ALuint SamplesToDo,        \
+  const ALfloat *restrict SamplesIn,                                          \
+  ALfloat (*restrict SamplesOut)[BUFFERSIZE])                                 \
+{                                                                             \
+    const ALuint step = state->step;                                          \
+    ALuint index = state->index;                                              \
+    ALuint base;                                                              \
+                                                                              \
+    for(base = 0;base < SamplesToDo;)                                         \
+    {                                                                         \
+        ALfloat temps[64];                                                    \
+        ALuint td = minu(SamplesToDo-base, 64);                               \
+        ALuint i, k;                                                          \
+                                                                              \
+        for(i = 0;i < td;i++)                                                 \
+        {                                                                     \
+            ALfloat samp;                                                     \
+            samp = SamplesIn[base+i];                                         \
+            samp = hpFilter1P(&state->iirFilter, samp);                       \
+                                                                              \
+            index += step;                                                    \
+            index &= WAVEFORM_FRACMASK;                                       \
+            temps[i] = samp * func(index);                                    \
+        }                                                                     \
+                                                                              \
+        for(k = 0;k < MaxChannels;k++)                                        \
+        {                                                                     \
+            ALfloat gain = state->Gain[k];                                    \
+            if(!(gain > 0.00001f))                                            \
+                continue;                                                     \
+                                                                              \
+            for(i = 0;i < td;i++)                                             \
+                SamplesOut[k][base+i] += gain * temps[i];                     \
+        }                                                                     \
+                                                                              \
+        base += td;                                                           \
+    }                                                                         \
+    state->index = index;                                                     \
+}
+
+DECL_TEMPLATE(Sin)
+DECL_TEMPLATE(Saw)
+DECL_TEMPLATE(Square)
+
+#undef DECL_TEMPLATE
+
+
+static ALvoid ALmodulatorState_Destruct(ALmodulatorState *state)
+{
+    (void)state;
+}
+
+static ALboolean ALmodulatorState_DeviceUpdate(ALmodulatorState *state, ALCdevice *Device)
+{
+    return AL_TRUE;
+    (void)state;
+    (void)Device;
+}
+
+static ALvoid ALmodulatorState_Update(ALmodulatorState *state, ALCdevice *Device, const ALeffectslot *Slot)
+{
+    ALfloat gain, cw, a = 0.0f;
+    ALuint index;
+
+    if(Slot->effect.Modulator.Waveform == AL_RING_MODULATOR_SINUSOID)
+        state->Waveform = SINUSOID;
+    else if(Slot->effect.Modulator.Waveform == AL_RING_MODULATOR_SAWTOOTH)
+        state->Waveform = SAWTOOTH;
+    else if(Slot->effect.Modulator.Waveform == AL_RING_MODULATOR_SQUARE)
+        state->Waveform = SQUARE;
+
+    state->step = fastf2u(Slot->effect.Modulator.Frequency*WAVEFORM_FRACONE /
+                          Device->Frequency);
+    if(state->step == 0) state->step = 1;
+
+    cw = cosf(F_PI*2.0f * Slot->effect.Modulator.HighPassCutoff /
+                          Device->Frequency);
+    a = (2.0f-cw) - sqrtf(powf(2.0f-cw, 2.0f) - 1.0f);
+    state->iirFilter.coeff = a;
+
+    gain = sqrtf(1.0f/Device->NumChan);
+    gain *= Slot->Gain;
+    for(index = 0;index < MaxChannels;index++)
+        state->Gain[index] = 0.0f;
+    for(index = 0;index < Device->NumChan;index++)
+    {
+        enum Channel chan = Device->Speaker2Chan[index];
+        state->Gain[chan] = gain;
+    }
+}
+
+static ALvoid ALmodulatorState_Process(ALmodulatorState *state, ALuint SamplesToDo, const ALfloat *restrict SamplesIn, ALfloat (*restrict SamplesOut)[BUFFERSIZE])
+{
+    switch(state->Waveform)
+    {
+        case SINUSOID:
+            ProcessSin(state, SamplesToDo, SamplesIn, SamplesOut);
+            break;
+
+        case SAWTOOTH:
+            ProcessSaw(state, SamplesToDo, SamplesIn, SamplesOut);
+            break;
+
+        case SQUARE:
+            ProcessSquare(state, SamplesToDo, SamplesIn, SamplesOut);
+            break;
+    }
+}
+
+static ALeffectStateFactory *ALmodulatorState_getCreator(void)
+{
+    return STATIC_CAST(ALeffectStateFactory, &ModulatorFactory);
+}
+
+DEFINE_ALEFFECTSTATE_VTABLE(ALmodulatorState);
+
+
+static ALeffectState *ALmodulatorStateFactory_create(void)
+{
+    ALmodulatorState *state;
+
+    state = malloc(sizeof(*state));
+    if(!state) return NULL;
+    SET_VTABLE2(ALmodulatorState, ALeffectState, state);
+
+    state->index = 0;
+    state->step = 1;
+
+    state->iirFilter.coeff = 0.0f;
+    state->iirFilter.history[0] = 0.0f;
+
+    return STATIC_CAST(ALeffectState, state);
+}
+
+static ALvoid ALmodulatorStateFactory_destroy(ALeffectState *effect)
+{
+    ALmodulatorState *state = STATIC_UPCAST(ALmodulatorState, ALeffectState, effect);
+    ALmodulatorState_Destruct(state);
+    free(state);
+}
+
+DEFINE_ALEFFECTSTATEFACTORY_VTABLE(ALmodulatorStateFactory);
+
+
+static void init_modulator_factory(void)
+{
+    SET_VTABLE2(ALmodulatorStateFactory, ALeffectStateFactory, &ModulatorFactory);
+}
+
+ALeffectStateFactory *ALmodulatorStateFactory_getFactory(void)
+{
+    static pthread_once_t once = PTHREAD_ONCE_INIT;
+    pthread_once(&once, init_modulator_factory);
+    return STATIC_CAST(ALeffectStateFactory, &ModulatorFactory);
+}
+
+
+void mod_SetParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat val)
+{
+    switch(param)
+    {
+        case AL_RING_MODULATOR_FREQUENCY:
+            if(val >= AL_RING_MODULATOR_MIN_FREQUENCY && val <= AL_RING_MODULATOR_MAX_FREQUENCY)
+                effect->Modulator.Frequency = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        case AL_RING_MODULATOR_HIGHPASS_CUTOFF:
+            if(val >= AL_RING_MODULATOR_MIN_HIGHPASS_CUTOFF && val <= AL_RING_MODULATOR_MAX_HIGHPASS_CUTOFF)
+                effect->Modulator.HighPassCutoff = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        default:
+            alSetError(context, AL_INVALID_ENUM);
+            break;
+    }
+}
+void mod_SetParamfv(ALeffect *effect, ALCcontext *context, ALenum param, const ALfloat *vals)
+{
+    mod_SetParamf(effect, context, param, vals[0]);
+}
+void mod_SetParami(ALeffect *effect, ALCcontext *context, ALenum param, ALint val)
+{
+    switch(param)
+    {
+        case AL_RING_MODULATOR_FREQUENCY:
+        case AL_RING_MODULATOR_HIGHPASS_CUTOFF:
+            mod_SetParamf(effect, context, param, (ALfloat)val);
+            break;
+
+        case AL_RING_MODULATOR_WAVEFORM:
+            if(val >= AL_RING_MODULATOR_MIN_WAVEFORM && val <= AL_RING_MODULATOR_MAX_WAVEFORM)
+                effect->Modulator.Waveform = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        default:
+            alSetError(context, AL_INVALID_ENUM);
+            break;
+    }
+}
+void mod_SetParamiv(ALeffect *effect, ALCcontext *context, ALenum param, const ALint *vals)
+{
+    mod_SetParami(effect, context, param, vals[0]);
+}
+
+void mod_GetParami(ALeffect *effect, ALCcontext *context, ALenum param, ALint *val)
+{
+    switch(param)
+    {
+        case AL_RING_MODULATOR_FREQUENCY:
+            *val = (ALint)effect->Modulator.Frequency;
+            break;
+        case AL_RING_MODULATOR_HIGHPASS_CUTOFF:
+            *val = (ALint)effect->Modulator.HighPassCutoff;
+            break;
+        case AL_RING_MODULATOR_WAVEFORM:
+            *val = effect->Modulator.Waveform;
+            break;
+
+        default:
+            alSetError(context, AL_INVALID_ENUM);
+            break;
+    }
+}
+void mod_GetParamiv(ALeffect *effect, ALCcontext *context, ALenum param, ALint *vals)
+{
+    mod_GetParami(effect, context, param, vals);
+}
+void mod_GetParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *val)
+{
+    switch(param)
+    {
+        case AL_RING_MODULATOR_FREQUENCY:
+            *val = effect->Modulator.Frequency;
+            break;
+        case AL_RING_MODULATOR_HIGHPASS_CUTOFF:
+            *val = effect->Modulator.HighPassCutoff;
+            break;
+
+        default:
+            alSetError(context, AL_INVALID_ENUM);
+            break;
+    }
+}
+void mod_GetParamfv(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *vals)
+{
+    mod_GetParamf(effect, context, param, vals);
+}